Force clean and checkout to use the push remotes.

Note this is a combined CL pulling in the NameError/
cleanup fix.

BUG=chromium-os:27089
TEST=throw it at the builders, verify chromeos_version matches
     current release version.  Crappy test admittedly.

Change-Id:Icf6a88cc201f2e6b5963acc33ee2dc9a42468a28
Reviewed-on: https://gerrit.chromium.org/gerrit/24018
Reviewed-by: David James <davidjames@chromium.org>
Tested-by: David James <davidjames@chromium.org>
2 files changed